Since she doesn't financially support you at all, she cannot claim you as a dependant. This isn't a question of option A vs option B. It isn't a choice. Legally, she can't do it. You must file on your own.
That said, people cheat on their taxes all the time. If you and she both choose to cheat then here are the possible outcomes:
1) You both could be subject to penalties, back payments, and/or interest.
2) If she claims you, then she will get an extra exemption on her taxes. If you claim yourself, then you get that exemption.
3) In most cases, the parent is usually in a higher tax bracket. Thus, an exemption for her is usually more valuable. Suppose she is in the 25% tax bracket and you are in the 10% tax bracket. In that case, by claiming you, she'd save 25% * $3650 = $912.50 on her taxes while you'd pay 10% * $3650 = $365.00 more on your taxes.
4) I'm ignoring other welfare-type effects for now unless you tell us otherwise that she'd qualify.
Thus, it is up to you if you want to violate the tax laws and pay more taxes so that your mom can also violate the laws and pay less taxes. I assume you'd split the gain with her and you'd split the fines with her if either of you are caught.